<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="js/vue.js"></script>
</head>
<body>
  <div id="app">
    <h2>{{message}}</h2>
    <!-- 屏蔽mustache语法，原封不动展示内容 -->
    <h2 v-pre>{{message}}</h2>
  </div>
  <script>
    let app = new Vue({
      el: "#app",
      data: {
        message: "Hello Vue!"
      }
    })
  </script>
</body>
</html>